2131431113 has 4 divisors (see below), whose sum is σ = 2435921280. Its totient is φ = 1826940948.

The previous prime is 2131431097. The next prime is 2131431157. The reversal of 2131431113 is 3111341312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2131431113 - 2⁴ = 2131431097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131431193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152245073 + ... + 152245086.

It is an arithmetic number, because the mean of its divisors is an integer number (608980320).

Almost surely, 2^2131431113 is an apocalyptic number.

It is an amenable number.

2131431113 is a deficient number, since it is larger than the sum of its proper divisors (304490167).

2131431113 is an equidigital number, since it uses as much as digits as its factorization.

2131431113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304490166.

The product of its digits is 216, while the sum is 20.

The square root of 2131431113 is about 46167.4248036427. The cubic root of 2131431113 is about 1286.9364462076.

Adding to 2131431113 its reverse (3111341312), we get a palindrome (5242772425).

The spelling of 2131431113 in words is "two billion, one hundred thirty-one million, four hundred thirty-one thousand, one hundred thirteen".